diff -r c64216addd7f Modules/socketmodule.c
--- a/Modules/socketmodule.c	Mon Aug 22 11:55:57 2011 +1000
+++ b/Modules/socketmodule.c	Mon Aug 22 15:08:19 2011 +1000
@@ -1745,7 +1745,7 @@
     static const size_t cmsg_len_end = (offsetof(struct cmsghdr, cmsg_len) +
                                         sizeof(cmsgh->cmsg_len));
 
-    if (cmsgh == NULL || msg->msg_control == NULL || msg->msg_controllen < 0)
+    if (cmsgh == NULL || msg->msg_control == NULL)
         return 0;
     if (space < cmsg_len_end)
         space = cmsg_len_end;